Should you ever require someone for a character speaking Italian, I would be happy to help.
There aren't any Italian X-Men but there are several other characters in the Marvel universe that could fit. Though that'd have to wait for the sequel.
I could help. I'm fluent in both German and English (as long as no one asks me to speak English, my pronunciation is bad.

).
As long as you can read and write it then there's no problem at all.
So if you guys are still willing to try after 3 attempts, I would be happy to help.
We'd appreciate any contributions. Just know you'd probably have to go on a trial period to avoid spoilers. Message me on the discord and I'll get you in touch with the writers.
But I have to say that Kurt is from Bavaria and the different regions of Germany have quite diverse accents and usage of language and I do not know much about the Bavarian dialect. Even tough I think going so far would be a bit much.
Yeah, we're not gonna have Kurt have entire conversations in German. We just need someone to check basic grammar and spelling. Our confusion with Bruder and Brüder is something we want to avoid in the future.
In the comics, Xavier just mentally projected an English dictionary into the heads of non-English speaking members. They know the words but don't know all of the grammar rules and very little or no slang. This is partially why Sunfire went back to Japan. No cultural primer came with the language.